improve waterfall resume operation

src/core/base.py

@@ -97,11 +97,17 @@ class MigrationContext:
             }
             
             # CONSISTENCY: Once target metadata is known, initialize the flat SQLite DB.
-            if results["target_community"] and results["target_community_name"]:
+            if results["target_community"]:
                 tid = self.config.fluxer_server_id if self.target_platform == "fluxer" else self.config.stoat_server_id
+                
+                # Prefer the original discord community name for the DB file if available (e.g. from live load or backup)
+                db_name = results.get("discord_server_name")
+                if not db_name or db_name == "Not Found" or db_name == "Unknown":
+                    db_name = results.get("target_community_name") or "Unknown"
+
                 self.ensure_state_initialized(
                     str(tid or ""),
-                    results["target_community_name"]
+                    db_name
                 )
                 
             return results
@@ -120,6 +126,23 @@ class MigrationContext:
             return
             
         import re
+        import json
+        
+        # Override the target name explicitly with the original Discord source name if available.
+        # This fixes naming collisions and UI confusion like "Fluxer-123456.db" instead of "MyServer-123456.db"
+        try:
+            if hasattr(self.discord_reader, "guild") and getattr(self.discord_reader, "guild", None):
+                community_name = getattr(self.discord_reader, "guild").name
+            elif getattr(self, "source_mode", "live") == "backup" and hasattr(self.discord_reader, "backup_dir"):
+                b_dir = getattr(self.discord_reader, "backup_dir")
+                if b_dir and b_dir.exists():
+                    meta_file = b_dir / "metadata.json"
+                    if meta_file.exists():
+                        data = json.loads(meta_file.read_text())
+                        community_name = data.get("name", community_name)
+        except Exception:
+            pass
+
         clean_name = re.sub(r'[^\w\s-]', '', community_name).strip()
         clean_name = re.sub(r'[-\s]+', '_', clean_name)
         

src/core/database.py

@@ -560,6 +560,15 @@ class MigrationDatabase:
         conn.execute("DELETE FROM thread_tracking WHERE channel_id = ?", (str(channel_id),))
         conn.commit()
         logger.info(f"Cleared all tracking and mapping data for channel: {channel_id}")
+    def clear_all_migration_data(self):
+        """Purge all mappings and tracking data for ALL channels and threads."""
+        conn = self._get_conn()
+        conn.execute("DELETE FROM message_mappings")
+        conn.execute("DELETE FROM thread_mappings")
+        conn.execute("DELETE FROM channel_tracking")
+        conn.execute("DELETE FROM thread_tracking")
+        conn.commit()
+        logger.info("Cleared ALL tracking and message mapping data globally.")
 
     def close(self):
         if hasattr(self._local, "conn"):

src/core/state.py

@@ -238,15 +238,11 @@ class MigrationState:
             return self.db.get_global_min_last_message_id(all_mapped_ids)
         return None
 
-    def set_waterfall_last_id(self, last_id: str | int):
-        if self.db:
-            self.db.set_metadata("waterfall_last_id", str(last_id))
 
-    def get_waterfall_last_id(self) -> int | None:
-        if self.db:
-            val = self.db.get_metadata("waterfall_last_id")
-            return int(val) if val else None
-        return None
+    def clear_all_migration_data(self):
+        """Clears all message mapping and tracking state globally."""
+        if self._ensure_db():
+            self.db.clear_all_migration_data()
             
     def get_all_last_message_ids(self) -> Dict[str, str]:
         """Returns a combined map of channel_id/thread_id -> last_msg_id."""

src/fluxer/migrate_message.py

@@ -905,7 +905,8 @@ async def migrate_global_messages(
                 if fluxer_msg_id:
                     context.state.set_target_message_mapping(target_channel_id, msg.id, fluxer_msg_id)
                     context.state.update_last_message_id(target_channel_id, msg.id)
-                    context.state.set_waterfall_last_id(msg.id)
+                    context.state.update_last_message_timestamp(target_channel_id, str(msg.created_at))
+                    context.state.increment_stats(target_channel_id, messages=1, files=len(files) if files else 0)
                     stats["attachments"] += len(files) if files else 0
 
                 stats["messages"] += 1

src/stoat/migrate_message.py

@@ -896,7 +896,8 @@ async def migrate_global_messages(
                 if stoat_msg_id:
                     context.state.set_target_message_mapping(target_channel_id, msg.id, stoat_msg_id)
                     context.state.update_last_message_id(target_channel_id, msg.id)
-                    context.state.set_waterfall_last_id(msg.id)
+                    context.state.update_last_message_timestamp(target_channel_id, str(msg.created_at))
+                    context.state.increment_stats(target_channel_id, messages=1, files=len(files) if files else 0)
                     stats["attachments"] += len(files) if files else 0
 
                 stats["messages"] += 1

src/ui/shuttle_ops.py

@@ -1551,10 +1551,8 @@ class OperationPane(Container):
                 if filtered_tgt_ids:
                     all_mapped_tgt_ids = filtered_tgt_ids
 
-            # 2.6 Resume Point: Prioritize Global waterfall tracker, fallback to channel minimums
-            min_last_id = self.engine.state.get_waterfall_last_id()
-            if min_last_id is None:
-                min_last_id = self.engine.state.get_global_min_last_message_id(all_mapped_tgt_ids)
+            # 2.6 Resume Point: Calculate from global channel minimums
+            min_last_id = self.engine.state.get_global_min_last_message_id(all_mapped_tgt_ids)
             
             modal.write(f"\n[bold cyan]Waterfall Migration Resume Point:[/bold cyan]")
             if min_last_id is not None:
@@ -1566,7 +1564,7 @@ class OperationPane(Container):
                 show_continue=min_last_id is not None,
                 show_id=False,
                 btn_start_label="Start From Beginning",
-                btn_start_tooltip="Safe, skips duplicates automatically",
+                btn_start_tooltip="Wipes migration progress and restarts from the beginning; may create duplicates",
                 btn_start_variant="default" if min_last_id is not None else "primary",
                 btn_continue_label=f"Continue from ID {min_last_id if min_last_id is not None else 0}" if min_last_id is not None else "Continue Migration",
                 btn_continue_tooltip="Fastest"
@@ -1582,7 +1580,11 @@ class OperationPane(Container):
                 return
                 
             after_id = None
-            if choice == "btn_continue" and min_last_id is not None:
+            if choice == "btn_start_first":
+                logger.info("Proceeding with 'Start from Beginning' (global clean sink).")
+                self.engine.state.clear_all_migration_data()
+                after_id = None
+            elif choice == "btn_continue" and min_last_id is not None:
                 after_id = int(min_last_id)
             
             # Phase 3: Progress
@@ -1599,6 +1601,7 @@ class OperationPane(Container):
                 tid = self.config.fluxer_server_id
             self.engine.ensure_state_initialized(str(tid or ""), platform_name)
 
+            modal.show_stats()
             modal.write("Scanning global footprint for totals ...")
             stats_analysis = await migrate_mod.analyze_global_migration(self.engine, after_message_id=after_id)
             total_messages = stats_analysis["messages"]